By (T2 *-weighted images and T1-weighted image) double contrast keyhole echo planar imaging (DC-EPIC)The present invention relates to method of inspecting at least one object, the method, and detecting a characteristic of the object in different times in the space formed by the space-...
MRI超快速序列对梯度场的场强及切换率都有很高的要求,高梯度场及高切换率不仅可以缩短回波间隙(echo space,ES)、加快信号采集速度,还有利于提高图像的信噪比(signal-to-noise ratio,SNR)。现代新型1.5 T MR扫描仪高性能梯度线圈场强已达25 mT/m以上,切换率可达120 T.m-1.s-1以上。 MR成像对接收线圈也有很高...
Additionally, information on signal intensity obtained from T2-weighted images (T2WI) was also reported to have a relation to tumor histological grade (11). This information can be acquired completely noninvasively, without ...
The results of the reconstructions of the T2–weighted images from the undersampled MRI data using different techniques are now presented. For illustration, only the results corresponding to the experimental data acquired at the lowest sampling percentage, 3.1% of k–space, are shown. Fig. 3 show...
A whole-brain T2-weighted 3D-encoded variable flip angle turbo spin echo structural image (T2 SPACE) was also acquired (acquisition parameters: TR = 3200 ms, TE = 4.06 ms, variable flip angle, voxel size = 1 mm isotropic, matrix size = 256 ×256, 176 sagittal slices, FOV = 256 mm)...
4as the local deposition of iron alters magnetic field inhomogeneities and appears hypointense in T2or T2*-weighted images (T2*WI) due to the shortening of transverse relaxation times2,5. By taking advantage of region-specific iron content within the SN, the area of lower T2*-weighted signal...
Different from MRF which simulates the magnetization for each readout, for the Cartesian sampling, only one image was acquired per cardiac cycle with the contrast dominated by the k-space center and therefore only the transverse magnetization simulated corresponding to the center of k-space was ...
This suggests that the contrast agent diffused into the intracellular space, indicating the loss of cell membrane integrity. As a result, T1 signal intensity was also higher in the reperfused-infarcted myocardium than in normal myocardium. T1- and T2*-weighted images can be acquired simultaneously....
Sagittal T2-weighted and STIR sequence images from the same study for each patient were examined for MS plaques using a double-blinded review of individual images 'separated in time and space', such that STIR and T2 image pairs were never analyzed simultaneously. Number of lesions and lesion ...
It is challenging to extract the brain region from T2-weighted magnetic resonance infant brain images because conventional brain segmentation algorithms are generally optimized for adult brain images, which have different spatial resolution, dynamic changes of imaging intensity, brain size and shape from ...